Feed-pump.



No. 667,|47. Patented Ian. 29, |901. W. L. GABRELS &. C. KIMBALL.

FEED PUMP.

(No Model.) (Application led Feb. 6, 1900.)

Vfl/roes- UNITED STATES PATENT OFFICE.

WILLIAM L. GARRELS, OF ST. LOUIS, AND CLINTON KIMBALL, OF KIRKWOOD,MISSOURI.

FEED-PUMP.

SPECIFICATION forming part of Letters Patent No. 667,147, dated January29, 1901.

Application led February 6, 1900. [Serial No. 4,185. (No model.)

'b (1J/Z whom it nfl/tty concern,.-

Beit known that we, WILLIAM L. GARRELS, a resident of the city of St.Louis, and CLIN- TON KIMBALL, a resident of the city of Kirkwood, St.Louis county, Missouri, citizens of the United States, have inventedcertain new and useful Improvements in Feed-Pumps, of which thefollowing is a specification.

Our invention relates to feed-pumps for boilers, and has foritsprincipal objects to automatically and reliably control the operation ofthe pump according to the level of the water in the boiler, to insurecertainty in the operation of the pump, to economize the power requiredfor the operation of the pump, and to secure advantages hereinafterdescribed.

To these ends our invention consists in making the stroke of the pumpautomatically adjustable, as vhereinafter described.

It also consists in the combinations and arrangements of partshereinafter described and claimed.

In the accompanying drawings, which form part of this specification andwherein like symbols refer to like parts wherever they occur, Figure 1is a vertical view, mainly sectional, of our device. Fig. 2 isa verticalsectional detail of a modified form of the steamvalve operated by theiloat and of the chamber for receiving and discharging the water ofcondensation, this construction constituting an adjustment for theWater-level. Fig. 3 is a detail View of a lever for shifting the fulcrumof the lever which drives the pumppiston, and Fig. 4 is a detail view ofthe connection between the pump-operating lever and the shifting-lever.

The pu nip-piston 1 is reciprocated by means of a lever 2, pivotallyfastened to said piston by any suitable connecting device and having oneend connected by a slide 3 to the cross-head or other moving part of'the engine to receive motion therefrom. The other end of said lever ispivotally connected to a shifting-lever 4, having a fulcrum 5 in theframework of the engine. A convenient means for making a connectionbetween the piston-driving lever 2 and the fulcrum-shifting lever 4consists in the block 6, slotted to lit over the end of thepiston-driving lever, so as to slide thereon and carry lugs or trunnionsat its sides over which fit the perforated ends of the shifting lever.By this arrangement when the shifting-lever is moved the block 6 slidesendwise along the piston-driving lever 2, and thereby shifts the fulcrumof said piston-driving lever. The effect of shifting the fulcrum of thepiston driving lever is to vary the length of the stroke of thepump-piston, the stroke of said piston being at a maximum when thefulcrum of the Ypiston-lever is farthest from the piston and decreasingto zero when the fulcrum is moved by said shiftinglever into alinementwith the pivotal connection of the piston-driving lever.

The means for automatically regulating the shifting-lever, as shown inFig. l, consist of a pipe or tube 7, mounted in a framework andconnected by means of a pipe 8 to a water column or chamber 9, whichconnects through a pipe 10 at its top or upper portion to thesteam-space of the boiler and through a pipe 11 at its bottom with thelwater-space of the boiler. At the end of the pipe or tube 7 is acylinder 12, arranged to slide endwise thereon. This cylinder 12 is whenthe pump is not in operation pressed against the end of tube 7 by meansof a helical spring 13, surrounding said cylinder and bearing at one endagainst a shoulder thereon and bearing at its other end against aportion of the fra mework 14. The fulcrum-shifting lever 4 is connectedto this cylinder 12 by means of any suitable connection that will permitof a pivotal and sliding movement of the connected parts, respectively,whereby when the cylin ver extends through a lateral extension of thetank or chamber 9, provided for the ypurpose of permitting the use of alonger lever than could be used without such extension. The outerend ofthis lever is pivotally mounted on a lug or plate, which is held inplace b v means of a threaded nut which works in the threaded end ofsaid lateral extension of the Water-column. Obviously the boiler itselfmay constitute the oat-chamber. The pipe 8, which constitutes theconnection between the heat-chamber and the cylinder 12, opens into thechamber near the end of the lateral extension and is furnished with avalve operated by the ioat. The pipe 8 has a chamber 17 at its end forreceiving and discharging the water of condensation. Said chamber ismounted upon the upper end portion of said lateral extension. The bottomof said chamber has a small hole or port 18 through it to constitute thepassage for the steam. This hole is closed by means of a plug or valve19,- whose stem or lower end has a slot in which the lever 16 ts andworks, and said stem is mounted in suitable guides to center it inalinement with the hole 18. By this arrangement the valve is raised andlowered by means of the fioat, which acts with a long leverage, andtherebyinsures certainty of the operation of the valve, and the floatitself rises and falls, according to the level of the water in theboiler. Vhen the valve 19 is lowered, it opens the valve-port 18 andadmits the steam from the boiler through the condenser into the pipe S,and this pressure forces the cylinder 12 to slide along the tube 7 untilit comes in contact with a portion of the framework 14, carrying with itthe fulcrum-shifting leverl. This movement of the fulcrum-shifting levershifts the fulcrum of the piston-operating lever 2 to its outermostposition, and thereby causes said piston to reciprocate the full lengthof its stroke. When the pump thus actuated has lled the boiler to therequired level, the float 15, acting through the lever 16, raises thevalve 19 against its seat, and thereby closes the port 18. Thereupon thesteam in the pipe 8 and in the chamber 17 condenses and the spring 13gradually forces the cylinder 12 back until it comes in contact with thepiston 7. During the return movement of the cylinder thefulcrum-shifting lever -1 is pushed gradually back, whereby the fulcru mof the piston-driving lever approaches the piston itself. The obviousresultof this operation is to continually shorten the stroke of thepiston until when the fulcrum of the piston-driving lever is inalinement with said pistou there is no stroke at all. The principaladvantage of this construction is that the pump ceases to operate andtherefore requires no power whenever the water in the boiler has reachedthe required level. The chamber 17, mounted just above the valve 19, isarranged to cause the water formed by the condensed steam to How backinto the tank as soon as the Valve opens. For this purpose the bottom ofthe The water which condenses at the other end of the pipe 8 and in thetube 7 is allowed to remain there and act as a fluid-piston. An air-vent2O maybe provided a-t some pointin the pipe 8 or the chamber 17 toprevent the device becoming airbound, or one of the union-joints at theends of the pipe S may be used for this purpose.

In case it is desired to regulate the stroke of the pump independentlyof the automatic controlling device above described the fulcrum-shiftinglever is provided with a perforated arm 2l, and the framework isprovided with a series of notches or perforations therein arranged topermit the hole in the arm to register with each of the series in turn.A pin 22, passing through the framework and the arm, locks thefulcrum-shifting lever in any desired position, and thereby adjusts thestroke of the pump.

Our device admits of considerable modification and variation ofconstruction without departing from our invention and we do not desireto limit ourselves to the'construction shown. Thus the means forapplying the boiler-{nessure to the shifting of the fulcrum of thepump-driving lever admits of considerable variation. For instance, thefulcrumshiftiug lever may be entirely dispensed with and the fulcrum beconnected directly or through other devices to the steam-actuated part.So, also, instead ofa cylinder mounted on a tube and which constitutes apiston the steam-actuated part might be an ordinary piston locatedinside, of the tubular member. So, also, the source of power forregulating the stroke may be different from that which drives theengine. So the pum p-driving lcver may be connected to a rotary part aswell as to a reciprocating part of the engine. So the fulcrum-shiftinglever may be permanently connected to the pump-driving lever. In thiscase the shifting of the fulcrum moves the pump-driving lever endwisebodily and the lever is slotted at its opposite end to slide ou itsconnecting-pin.

What we claim is- 1. A pump, comprising a lever connected to a movingpart of an engine, a fulcrum for said lever, a connecting deviceconnecting said lever to the pump-piston to actuate the same, saidfulcrum and connecting device heilig relatively movable, and means foreffecting such movement, said means comprising a passage-way arranged tocommunicate with a source of pressure, an automaticallyacting device forcontrolling said passageway, and adjunctive devices for transmittingsuch pressure to the movable part, substantially as described.

2. A pump comprising a lever connected to a moving part of an engine, amovable fulcrum for said lever and means for shifting said fulcrum, saidlever being connected to the pump-piston to actuate the same, said meanscomprising a passage-way adapted to communicate with a source ofpressure and an automatically-acting device for control- IIO ling saidpassage-Way, and adj unctive devices for transmitting power to saidfulcrum, substantially as described.

3. A pump comprising a lever driven by an engine and operativelyconnected to the pump-piston to actuate the same, a source of pressure,power-transmission devices actuated by said pressure, a movableconnecting device connecting said lever to said powertransmissiondevices, and a device controlled by the water-level for controlling theadmission of pressure to said power-transmission devices, substantiallyas described.

Il. A pump comprising a lever driven by an engine and operativelyconnected to the pump-piston to actuate the same, a source of pressure,power-transmission devices actuated by said pressure, a movableconnecting device connecting said lever to said powertransmissiondevices, and a device comprising a lioat for controlling the admissionof pressure to said power-transmission devices, substantially asdescribed.

5. A pump comprising a lever driven by an engine and operativelyconnected to the pump-piston to actuate the same, a controlling device,a device controlled by the waterlevel, adjunctive devices connectingsaid water-level device to said controlling device, and a movable devicefor connecting said controlling device to said lever, substantially asdescribed.

li. A pump comprising a lever driven by an engine and operativelyconnected to the pump-piston to actuate the same, a controlling device,a float for controlling said controlling device, adjunctive devicesconnecting said iioat to said cont-rolling device, and a movable devicefor connecting said controlling device to said lever, substantially asdescribed.

7. A pump comprisinga lever connected to a moving part of an engine, amovable fulcrum for said lever, and automatically-acting meanscomprisinga iioat for shiftingsaid fulcrum, said. lever being connectedto said pump-piston to actuate the saine, substantially as described.

8. A pump comprising a lever connected to a moving part of an engine, amovable fulcrum for said lever, and means for shifting said fulcrum,said lever being connected to the pump-piston to actuate the same, andsaid means comprising a spring-actuated piston operatively connected toan automaticallycontrolled source of steam-pressure to be actuatedthereby and operatively connected io said fulcrum to shift the same,substantially as described.

9. A pump comprising alever connected to a moving part of an engine,said lever being connected to the pump-piston to actuate the same and atube connected with a source of pressure,a piston therefor and a valvefor controlling said connection and a float arranged to control suchvalve, said piston being operatively connected to said lever by amovable joint arranged to be actuated by said piston, substantially asdescribed.

10. A boiler feed-pump comprising a lever connected to a moving part ofan engine, said lever being connected to the pump-piston to actuate thesame and a tube connected with a source of s1 eam-pressure, a pistontherefor and a valve for controlling said connection, a chamber inconnection with the boiler and a float in said chamber arranged tocontrol such valve, said piston being operatively connected to saidlever by a movable joint arranged to be actuated by said piston,substantially as described.

ll. A boiler feed-pump comprising a lever connected to a moving part ofan engine, said lever being connected to the pump-piston to actuate thesame and a water-level chamber connected to the boiler above and belowthe water-line, a spring-actuated piston mounted on a pipe connected tothe upper portion of said chamber,a valve for controlling said pipe anda float in said chamber for actuating said valve,said piston beingoperatively connected to said lever by a movable joint arranged to beactuated by said piston, substantially as described.

12. In a pump, a device for automatically regulating the stroke of thepump, comprising a lever connected to a moving part of an engine andconnected to the pump-piston to drive the same, anda piston operativelyconnected to a source of pressure, and an intermediate connecting devicefor operatively connecting said last-mentioned piston to said lever,andautomatically-acting means comprising a oat for controlling thepressure on said last-mentioned pist-on, substantially as described.

13. In a pump, a device for regulating the stroke of the pump comprisinga lever con nected to a moving part of an engine, and operativelyconnected to the pump-piston to actuate the same, a source of pressure,and a piston operatively connected to said source of pressure a movableconnecting device operatively connected to said lever and to said pistonrespectively, whereby said connecting device is adapted to be shifted bysaid piston, and means for automatically controlling the connection tothe source of pressure, substantially as described.

14. A pump comprising a controller, said controller comprising a pipeconnected to a source of steam-pressure and having a piston adapted tobe actuated by the pressurein said pipe and a chamber in said pipe forreceiving and discharging the water of condensation and means forconnecting said controller to the pump, substantially as described.

15. A pump comprising an automatic controller, said controllercomprising a pipe connected to a source of steam-pressure and having apiston adapted to be actuated by the pressure in said pipe and a chamberin said pipe for receiving and discharging the water of condensation andmeans for draining the IOO IIO

condensed steam from said chamber and means for connecting saidcontroller to the pump, substantially as described.

16. A pump comprising a controller, said controller comprising a pipeconnected to a source of steam-pressure and having a piston adapted tobe actuated by the pressure in said pipe and a chamber in said pipe forreceiving and discharging the water of. condensation and means forautomatically controlling the connection to a source of steam-pressureand means for connecting said controller to the pump, substantially asdescribed.

17. A pump comprising a controller, said controller comprising a pipeconnected to a source of steam-pressure and having a piston adapted tobe actuated bythe pressure in said pipe and a chamber in said pipe forreceiving and discharging the water of condensation and a float-actuatedlever for automatically controlling the connection to a source of steam-pressure and means for connecting said controller to the pump,substantially as described.

1S. In a pump, a device for automatically regulating the stroke of thepump, comprising a lever connected to a moving part of an engine andconnected to the pump-piston to drive the same, and a piston operativelyconnected to said lever to shift the connection between saidlast-mentioned piston and said lever, said piston being operativelyconnect.- ed to a source et' steam-pressure and a chamber in saidconnection Vfor receiving and discharging the water of condensation,substantially as described.

1 9. A pump comprising a lever connected at one end to a moving part ofan engine, a movable joint for said lever and automatically-acting meansfor shifting said joint, said lever being connected to the pump-pistonto actuate the same, and said means comprising a tube connected with asource of steampressure and having a chamber therein for receiving anddischarging the water of condensation, a float-controlled valve forcontrolling said connection, and a piston operatively connected i'o saidtube and to said joint, substantially as described.

20. A pump comprising a lever connected to a moving part oi an engine, amovable joint for said lever and automatically-acting means for shiftingsaid joint, said lever being connected to the pump-piston to actuate thesame and said means comprising a tube connected with a source otsteamwpressure and having a chamber therein for receiving anddischarging the water of condensation, a spring-actuated piston mountedon said tube, a' valve for controlling said connection with a source ofpressure, and a float for actuating said valve, said piston beingoperatively connected to said joint, substantially as described.

21. A pump comprising a lever driven by an exigirle and operativelyconnected to the pump-piston to actuate the same, a second lever, havingits fulcrum in the framework, operativelyconnected to saidfirst-mentioned lever and automatically-acting means comprising a devicecontrolled by the water-level for actuating said second-mentioned leverto shift the connection between the two levers, substantially asdescribed.

22. A pump comprising a piston-driving lever connected to a moving partof an engine, a second lever having its fulcrum in the framework andcarrying the fulcrum for said first-mentioned lever, andautomatically-aeting means comprising a float for actuating saidsecond-mentioned lever to shift said fulcrum lengthwise of saidfirst-mentioned lever, substantially as described.

WILLIAM L. GARRELS. CLINTON KIMBALL. In presence of- CHAs. E. WISE,WILLIAM P. CARR.

